28 Apr '16, 3pm

Robot Beats Piano Tiles

Ok, first – it’s not a marketing gimmick.. you’re totally jaded :) I built this after my 7 year old daughter showed me Piano Tiles and I figured I could beat it with a robot. There’s an iPhone 6+ overhead that does image processing – this runs a custom app using the GPU based on Apple’s RosyWriter sample code so it can handle frames at 120fps. This allows it to sample higher than the 60hz refresh rate of the iPad screen. It detects the speed of the oncoming tiles and looks ahead based on this to be able to get ahead of the communication delay and fastest swing time of the motors. When it detects a tile on a frame change, it sends a MIDI note for that key with the time to hit encoded in the velocity to a Teensy 3.2 (via lightning USB camera cable) The Teensy monitors and queues the MIDI messages, assigning each hit/release a specific deadline minus a static offset for the c...

Full article: http://hackaday.com/2016/04/28/robot-beats-piano-tiles/

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